392 LXCJBtfUD.lt. 



a slender more or less prominent white line edging the anticiliary 

 black line on the inner side, a subterminal geminate double black 

 spot in interspace 1 and a similar larger single spot in interspace 2. 

 Underside : ground-colour paler and brighter than in the d 1 , the 

 markings similar but more neatly and generally more clearly 

 defined ; both fore and hind wings in most of the specimens that 

 I have seen with a white terminal line before the anticiliary dark 

 line. Antennae, head, thorax and abdomen much as in the J . 



Exp. c? 2 20-25 mm. (O'78-l'OO"). 



Hob. Peninsular India from the outer Himalayas to Travancore, 

 avoiding the desert tracts ; Ceylon ; Assam ; Burma ; Tenasserim ; 

 the An damans and Nicobars ; extending into the Malayan Sub- 

 region to the Philippines. 



This form is most A'ariable both in the shade of the ground- 

 colour and in the exact shape of the markings. In females from 

 the Andamans the ground-colour on the underside of the wings 

 seems always to be a rich golden ochraceous. I have also seen 

 specimens of the female from Continental India, Assam and 

 Burma with the ground-colour of the same shade. The markings 

 on the underside in these specimens are always narrower, neater,, 

 more clearly denned, and the pairs of white lines instead of being 

 edged on the inner sides of each pair by fuscous are margined by 

 black lines. Also certain specimens from Sikhim, from Ceylon 

 and from the Andamans resemble very closely, both in the 

 ground-colour and markings of the underside, the figure of N. nora, 

 Felder, on plate xxxiv, fig. 34, of the ' Novara Eeise ' volume on the 

 Lepidoptera. I believe JFelder's species is simply a variety of 

 N. ardates. I have not however, seen the unique specimen from 

 the Andamans, identified by de Niceville (Z. c.) as N. nora, Eelder. 



With regard to Nacaduba noreia, Telder, the form next described, 

 the late Mr. de Niceville (see Jour. Bomb. N. H. Soc. x, ] 895, 

 p. 36) in enumerating the forms of Nacaduba that occur in 

 Sumatra made the following remarks : " Of all these, the only one 

 that presents any difficulty in identification is N. noreia. That 

 species has no tail, and I have always considered it to be a 

 dimorphic form in both sexes of N. ardates, Moore. I have both 

 sexes of the latter from Sumatra, but cf N. noreia only males, 

 unless, as I believe, its female has to be found in a very curiously 

 marked little butterfly which I possess in considerable numbers, 

 all the specimens being obviously females." On plate S. fig. 24 

 of the same volume Mr. de Niceville figured one of these females. 

 It certainly is " a very curiously marked little butterfly " and I 

 doubt its being a Nacaduba at all ; it cannot possibly be the $ of 

 Nacaduba noreia, Felder, for the type as described was according to 

 its author a $ , and ITelder's description does not agree with 

 de Niceville's at all. Again the tailless form of N. ardates cannot 

 be Felder's insect because the inner pair of white lines on the 

 underside of the fore wing in the latter do not, according to 



